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Mirrors > Home > MPE Home > Th. List > 0wlkon | Structured version Visualization version GIF version |
Description: A walk of length 0 from a vertex to itself. (Contributed by Alexander van der Vekens, 2-Dec-2017.) (Revised by AV, 3-Jan-2021.) (Revised by AV, 23-Mar-2021.) (Proof shortened by AV, 30-Oct-2021.) |
Ref | Expression |
---|---|
0wlk.v | ⊢ 𝑉 = (Vtx‘𝐺) |
Ref | Expression |
---|---|
0wlkon | ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(𝑁(WalksOn‘𝐺)𝑁)𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 482 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → 𝑃:(0...0)⟶𝑉) | |
2 | 0wlk.v | . . . . 5 ⊢ 𝑉 = (Vtx‘𝐺) | |
3 | 2 | 0wlkonlem1 29880 | . . . 4 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)) |
4 | 2 | 1vgrex 28770 | . . . . 5 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
5 | 4 | adantr 480 | . . . 4 ⊢ ((𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉) → 𝐺 ∈ V) |
6 | 2 | 0wlk 29878 | . . . 4 ⊢ (𝐺 ∈ V → (∅(Walks‘𝐺)𝑃 ↔ 𝑃:(0...0)⟶𝑉)) |
7 | 3, 5, 6 | 3syl 18 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (∅(Walks‘𝐺)𝑃 ↔ 𝑃:(0...0)⟶𝑉)) |
8 | 1, 7 | mpbird 257 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(Walks‘𝐺)𝑃) |
9 | simpr 484 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑃‘0) = 𝑁) | |
10 | hash0 14332 | . . . 4 ⊢ (♯‘∅) = 0 | |
11 | 10 | fveq2i 6888 | . . 3 ⊢ (𝑃‘(♯‘∅)) = (𝑃‘0) |
12 | 11, 9 | eqtrid 2778 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑃‘(♯‘∅)) = 𝑁) |
13 | 0ex 5300 | . . . 4 ⊢ ∅ ∈ V | |
14 | 13 | a1i 11 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅ ∈ V) |
15 | 2 | 0wlkonlem2 29881 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → 𝑃 ∈ (𝑉 ↑pm (0...0))) |
16 | 2 | iswlkon 29423 | . . 3 ⊢ (((𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉) ∧ (∅ ∈ V ∧ 𝑃 ∈ (𝑉 ↑pm (0...0)))) → (∅(𝑁(WalksOn‘𝐺)𝑁)𝑃 ↔ (∅(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = 𝑁 ∧ (𝑃‘(♯‘∅)) = 𝑁))) |
17 | 3, 14, 15, 16 | syl12anc 834 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (∅(𝑁(WalksOn‘𝐺)𝑁)𝑃 ↔ (∅(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = 𝑁 ∧ (𝑃‘(♯‘∅)) = 𝑁))) |
18 | 8, 9, 12, 17 | mpbir3and 1339 | 1 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(𝑁(WalksOn‘𝐺)𝑁)𝑃) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 Vcvv 3468 ∅c0 4317 class class class wbr 5141 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ↑pm cpm 8823 0cc0 11112 ...cfz 13490 ♯chash 14295 Vtxcvtx 28764 Walkscwlks 29362 WalksOncwlkson 29363 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-ifp 1060 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-er 8705 df-map 8824 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13491 df-fzo 13634 df-hash 14296 df-word 14471 df-wlks 29365 df-wlkson 29366 |
This theorem is referenced by: 0wlkons1 29883 0trlon 29886 |
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